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-rw-r--r--arch/sh/kernel/setup.c649
1 files changed, 649 insertions, 0 deletions
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
new file mode 100644
index 000000000000..25b9d9ebe858
--- /dev/null
+++ b/arch/sh/kernel/setup.c
@@ -0,0 +1,649 @@
+/* $Id: setup.c,v 1.30 2003/10/13 07:21:19 lethal Exp $
+ *
+ * linux/arch/sh/kernel/setup.c
+ *
+ * Copyright (C) 1999 Niibe Yutaka
+ * Copyright (C) 2002, 2003 Paul Mundt
+ */
+
+/*
+ * This file handles the architecture-dependent parts of initialization
+ */
+
+#include <linux/tty.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/initrd.h>
+#include <linux/bootmem.h>
+#include <linux/console.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/utsname.h>
+#include <linux/cpu.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/io_generic.h>
+#include <asm/sections.h>
+#include <asm/irq.h>
+#include <asm/setup.h>
+
+#ifdef CONFIG_SH_KGDB
+#include <asm/kgdb.h>
+static int kgdb_parse_options(char *options);
+#endif
+extern void * __rd_start, * __rd_end;
+/*
+ * Machine setup..
+ */
+
+/*
+ * Initialize loops_per_jiffy as 10000000 (1000MIPS).
+ * This value will be used at the very early stage of serial setup.
+ * The bigger value means no problem.
+ */
+struct sh_cpuinfo boot_cpu_data = { CPU_SH_NONE, 0, 10000000, };
+struct screen_info screen_info;
+
+#if defined(CONFIG_SH_UNKNOWN)
+struct sh_machine_vector sh_mv;
+#endif
+
+/* We need this to satisfy some external references. */
+struct screen_info screen_info = {
+ 0, 25, /* orig-x, orig-y */
+ 0, /* unused */
+ 0, /* orig-video-page */
+ 0, /* orig-video-mode */
+ 80, /* orig-video-cols */
+ 0,0,0, /* ega_ax, ega_bx, ega_cx */
+ 25, /* orig-video-lines */
+ 0, /* orig-video-isVGA */
+ 16 /* orig-video-points */
+};
+
+extern void platform_setup(void);
+extern char *get_system_type(void);
+extern int root_mountflags;
+
+#define MV_NAME_SIZE 32
+
+static struct sh_machine_vector* __init get_mv_byname(const char* name);
+
+/*
+ * This is set up by the setup-routine at boot-time
+ */
+#define PARAM ((unsigned char *)empty_zero_page)
+
+#define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
+#define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
+#define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
+#define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
+#define INITRD_START (*(unsigned long *) (PARAM+0x010))
+#define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
+/* ... */
+#define COMMAND_LINE ((char *) (PARAM+0x100))
+
+#define RAMDISK_IMAGE_START_MASK 0x07FF
+#define RAMDISK_PROMPT_FLAG 0x8000
+#define RAMDISK_LOAD_FLAG 0x4000
+
+static char command_line[COMMAND_LINE_SIZE] = { 0, };
+
+struct resource standard_io_resources[] = {
+ { "dma1", 0x00, 0x1f },
+ { "pic1", 0x20, 0x3f },
+ { "timer", 0x40, 0x5f },
+ { "keyboard", 0x60, 0x6f },
+ { "dma page reg", 0x80, 0x8f },
+ { "pic2", 0xa0, 0xbf },
+ { "dma2", 0xc0, 0xdf },
+ { "fpu", 0xf0, 0xff }
+};
+
+#define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource))
+
+/* System RAM - interrupted by the 640kB-1M hole */
+#define code_resource (ram_resources[3])
+#define data_resource (ram_resources[4])
+static struct resource ram_resources[] = {
+ { "System RAM", 0x000000, 0x09ffff, IORESOURCE_BUSY },
+ { "System RAM", 0x100000, 0x100000, IORESOURCE_BUSY },
+ { "Video RAM area", 0x0a0000, 0x0bffff },
+ { "Kernel code", 0x100000, 0 },
+ { "Kernel data", 0, 0 }
+};
+
+unsigned long memory_start, memory_end;
+
+static inline void parse_cmdline (char ** cmdline_p, char mv_name[MV_NAME_SIZE],
+ struct sh_machine_vector** mvp,
+ unsigned long *mv_io_base,
+ int *mv_mmio_enable)
+{
+ char c = ' ', *to = command_line, *from = COMMAND_LINE;
+ int len = 0;
+
+ /* Save unparsed command line copy for /proc/cmdline */
+ memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
+ saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
+
+ memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START;
+ memory_end = memory_start + __MEMORY_SIZE;
+
+ for (;;) {
+ /*
+ * "mem=XXX[kKmM]" defines a size of memory.
+ */
+ if (c == ' ' && !memcmp(from, "mem=", 4)) {
+ if (to != command_line)
+ to--;
+ {
+ unsigned long mem_size;
+
+ mem_size = memparse(from+4, &from);
+ memory_end = memory_start + mem_size;
+ }
+ }
+ if (c == ' ' && !memcmp(from, "sh_mv=", 6)) {
+ char* mv_end;
+ char* mv_comma;
+ int mv_len;
+ if (to != command_line)
+ to--;
+ from += 6;
+ mv_end = strchr(from, ' ');
+ if (mv_end == NULL)
+ mv_end = from + strlen(from);
+
+ mv_comma = strchr(from, ',');
+ if ((mv_comma != NULL) && (mv_comma < mv_end)) {
+ int ints[3];
+ get_options(mv_comma+1, ARRAY_SIZE(ints), ints);
+ *mv_io_base = ints[1];
+ *mv_mmio_enable = ints[2];
+ mv_len = mv_comma - from;
+ } else {
+ mv_len = mv_end - from;
+ }
+ if (mv_len > (MV_NAME_SIZE-1))
+ mv_len = MV_NAME_SIZE-1;
+ memcpy(mv_name, from, mv_len);
+ mv_name[mv_len] = '\0';
+ from = mv_end;
+
+ *mvp = get_mv_byname(mv_name);
+ }
+ c = *(from++);
+ if (!c)
+ break;
+ if (COMMAND_LINE_SIZE <= ++len)
+ break;
+ *(to++) = c;
+ }
+ *to = '\0';
+ *cmdline_p = command_line;
+}
+
+static int __init sh_mv_setup(char **cmdline_p)
+{
+#if defined(CONFIG_SH_UNKNOWN)
+ extern struct sh_machine_vector mv_unknown;
+#endif
+ struct sh_machine_vector *mv = NULL;
+ char mv_name[MV_NAME_SIZE] = "";
+ unsigned long mv_io_base = 0;
+ int mv_mmio_enable = 0;
+
+ parse_cmdline(cmdline_p, mv_name, &mv, &mv_io_base, &mv_mmio_enable);
+
+#ifdef CONFIG_SH_GENERIC
+ if (mv == NULL) {
+ mv = &mv_unknown;
+ if (*mv_name != '\0') {
+ printk("Warning: Unsupported machine %s, using unknown\n",
+ mv_name);
+ }
+ }
+ sh_mv = *mv;
+#endif
+#ifdef CONFIG_SH_UNKNOWN
+ sh_mv = mv_unknown;
+#endif
+
+ /*
+ * Manually walk the vec, fill in anything that the board hasn't yet
+ * by hand, wrapping to the generic implementation.
+ */
+#define mv_set(elem) do { \
+ if (!sh_mv.mv_##elem) \
+ sh_mv.mv_##elem = generic_##elem; \
+} while (0)
+
+ mv_set(inb); mv_set(inw); mv_set(inl);
+ mv_set(outb); mv_set(outw); mv_set(outl);
+
+ mv_set(inb_p); mv_set(inw_p); mv_set(inl_p);
+ mv_set(outb_p); mv_set(outw_p); mv_set(outl_p);
+
+ mv_set(insb); mv_set(insw); mv_set(insl);
+ mv_set(outsb); mv_set(outsw); mv_set(outsl);
+
+ mv_set(readb); mv_set(readw); mv_set(readl);
+ mv_set(writeb); mv_set(writew); mv_set(writel);
+
+ mv_set(ioremap);
+ mv_set(iounmap);
+
+ mv_set(isa_port2addr);
+ mv_set(irq_demux);
+
+#ifdef CONFIG_SH_UNKNOWN
+ __set_io_port_base(mv_io_base);
+#endif
+
+ return 0;
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+ unsigned long bootmap_size;
+ unsigned long start_pfn, max_pfn, max_low_pfn;
+
+#ifdef CONFIG_EARLY_PRINTK
+ extern void enable_early_printk(void);
+
+ enable_early_printk();
+#endif
+#ifdef CONFIG_CMDLINE_BOOL
+ strcpy(COMMAND_LINE, CONFIG_CMDLINE);
+#endif
+
+ ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
+
+#ifdef CONFIG_BLK_DEV_RAM
+ rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
+ rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
+ rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
+#endif
+
+ if (!MOUNT_ROOT_RDONLY)
+ root_mountflags &= ~MS_RDONLY;
+ init_mm.start_code = (unsigned long) _text;
+ init_mm.end_code = (unsigned long) _etext;
+ init_mm.end_data = (unsigned long) _edata;
+ init_mm.brk = (unsigned long) _end;
+
+ code_resource.start = virt_to_bus(_text);
+ code_resource.end = virt_to_bus(_etext)-1;
+ data_resource.start = virt_to_bus(_etext);
+ data_resource.end = virt_to_bus(_edata)-1;
+
+ sh_mv_setup(cmdline_p);
+
+#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
+#define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
+#define PFN_PHYS(x) ((x) << PAGE_SHIFT)
+
+#ifdef CONFIG_DISCONTIGMEM
+ NODE_DATA(0)->bdata = &discontig_node_bdata[0];
+ NODE_DATA(1)->bdata = &discontig_node_bdata[1];
+
+ bootmap_size = init_bootmem_node(NODE_DATA(1),
+ PFN_UP(__MEMORY_START_2ND),
+ PFN_UP(__MEMORY_START_2ND),
+ PFN_DOWN(__MEMORY_START_2ND+__MEMORY_SIZE_2ND));
+ free_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, __MEMORY_SIZE_2ND);
+ reserve_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, bootmap_size);
+#endif
+
+ /*
+ * Find the highest page frame number we have available
+ */
+ max_pfn = PFN_DOWN(__pa(memory_end));
+
+ /*
+ * Determine low and high memory ranges:
+ */
+ max_low_pfn = max_pfn;
+
+ /*
+ * Partially used pages are not usable - thus
+ * we are rounding upwards:
+ */
+ start_pfn = PFN_UP(__pa(_end));
+
+ /*
+ * Find a proper area for the bootmem bitmap. After this
+ * bootstrap step all allocations (until the page allocator
+ * is intact) must be done via bootmem_alloc().
+ */
+ bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
+ __MEMORY_START>>PAGE_SHIFT,
+ max_low_pfn);
+ /*
+ * Register fully available low RAM pages with the bootmem allocator.
+ */
+ {
+ unsigned long curr_pfn, last_pfn, pages;
+
+ /*
+ * We are rounding up the start address of usable memory:
+ */
+ curr_pfn = PFN_UP(__MEMORY_START);
+ /*
+ * ... and at the end of the usable range downwards:
+ */
+ last_pfn = PFN_DOWN(__pa(memory_end));
+
+ if (last_pfn > max_low_pfn)
+ last_pfn = max_low_pfn;
+
+ pages = last_pfn - curr_pfn;
+ free_bootmem_node(NODE_DATA(0), PFN_PHYS(curr_pfn),
+ PFN_PHYS(pages));
+ }
+
+ /*
+ * Reserve the kernel text and
+ * Reserve the bootmem bitmap. We do this in two steps (first step
+ * was init_bootmem()), because this catches the (definitely buggy)
+ * case of us accidentally initializing the bootmem allocator with
+ * an invalid RAM area.
+ */
+ reserve_bootmem_node(NODE_DATA(0), __MEMORY_START+PAGE_SIZE,
+ (PFN_PHYS(start_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);
+
+ /*
+ * reserve physical page 0 - it's a special BIOS page on many boxes,
+ * enabling clean reboots, SMP operation, laptop functions.
+ */
+ reserve_bootmem_node(NODE_DATA(0), __MEMORY_START, PAGE_SIZE);
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
+ if (&__rd_start != &__rd_end) {
+ LOADER_TYPE = 1;
+ INITRD_START = PHYSADDR((unsigned long)&__rd_start) - __MEMORY_START;
+ INITRD_SIZE = (unsigned long)&__rd_end - (unsigned long)&__rd_start;
+ }
+
+ if (LOADER_TYPE && INITRD_START) {
+ if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
+ reserve_bootmem_node(NODE_DATA(0), INITRD_START+__MEMORY_START, INITRD_SIZE);
+ initrd_start =
+ INITRD_START ? INITRD_START + PAGE_OFFSET + __MEMORY_START : 0;
+ initrd_end = initrd_start + INITRD_SIZE;
+ } else {
+ printk("initrd extends beyond end of memory "
+ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+ INITRD_START + INITRD_SIZE,
+ max_low_pfn << PAGE_SHIFT);
+ initrd_start = 0;
+ }
+ }
+#endif
+
+#ifdef CONFIG_DUMMY_CONSOLE
+ conswitchp = &dummy_con;
+#endif
+
+ /* Perform the machine specific initialisation */
+ platform_setup();
+
+ paging_init();
+}
+
+struct sh_machine_vector* __init get_mv_byname(const char* name)
+{
+ extern int strcasecmp(const char *, const char *);
+ extern long __machvec_start, __machvec_end;
+ struct sh_machine_vector *all_vecs =
+ (struct sh_machine_vector *)&__machvec_start;
+
+ int i, n = ((unsigned long)&__machvec_end
+ - (unsigned long)&__machvec_start)/
+ sizeof(struct sh_machine_vector);
+
+ for (i = 0; i < n; ++i) {
+ struct sh_machine_vector *mv = &all_vecs[i];
+ if (mv == NULL)
+ continue;
+ if (strcasecmp(name, get_system_type()) == 0) {
+ return mv;
+ }
+ }
+ return NULL;
+}
+
+static struct cpu cpu[NR_CPUS];
+
+static int __init topology_init(void)
+{
+ int cpu_id;
+
+ for (cpu_id = 0; cpu_id < NR_CPUS; cpu_id++)
+ if (cpu_possible(cpu_id))
+ register_cpu(&cpu[cpu_id], cpu_id, NULL);
+
+ return 0;
+}
+
+subsys_initcall(topology_init);
+
+static const char *cpu_name[] = {
+ [CPU_SH7604] = "SH7604",
+ [CPU_SH7705] = "SH7705",
+ [CPU_SH7708] = "SH7708",
+ [CPU_SH7729] = "SH7729",
+ [CPU_SH7300] = "SH7300",
+ [CPU_SH7750] = "SH7750",
+ [CPU_SH7750S] = "SH7750S",
+ [CPU_SH7750R] = "SH7750R",
+ [CPU_SH7751] = "SH7751",
+ [CPU_SH7751R] = "SH7751R",
+ [CPU_SH7760] = "SH7760",
+ [CPU_SH73180] = "SH73180",
+ [CPU_ST40RA] = "ST40RA",
+ [CPU_ST40GX1] = "ST40GX1",
+ [CPU_SH4_202] = "SH4-202",
+ [CPU_SH4_501] = "SH4-501",
+ [CPU_SH_NONE] = "Unknown"
+};
+
+const char *get_cpu_subtype(void)
+{
+ return cpu_name[boot_cpu_data.type];
+}
+
+#ifdef CONFIG_PROC_FS
+static const char *cpu_flags[] = {
+ "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
+};
+
+static void show_cpuflags(struct seq_file *m)
+{
+ unsigned long i;
+
+ seq_printf(m, "cpu flags\t:");
+
+ if (!cpu_data->flags) {
+ seq_printf(m, " %s\n", cpu_flags[0]);
+ return;
+ }
+
+ for (i = 0; i < cpu_data->flags; i++)
+ if ((cpu_data->flags & (1 << i)))
+ seq_printf(m, " %s", cpu_flags[i+1]);
+
+ seq_printf(m, "\n");
+}
+
+static void show_cacheinfo(struct seq_file *m, const char *type, struct cache_info info)
+{
+ unsigned int cache_size;
+
+ cache_size = info.ways * info.sets * info.linesz;
+
+ seq_printf(m, "%s size\t: %dKiB\n", type, cache_size >> 10);
+}
+
+/*
+ * Get CPU information for use by the procfs.
+ */
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+ unsigned int cpu = smp_processor_id();
+
+ if (!cpu && cpu_online(cpu))
+ seq_printf(m, "machine\t\t: %s\n", get_system_type());
+
+ seq_printf(m, "processor\t: %d\n", cpu);
+ seq_printf(m, "cpu family\t: %s\n", system_utsname.machine);
+ seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype());
+
+ show_cpuflags(m);
+
+ seq_printf(m, "cache type\t: ");
+
+ /*
+ * Check for what type of cache we have, we support both the
+ * unified cache on the SH-2 and SH-3, as well as the harvard
+ * style cache on the SH-4.
+ */
+ if (test_bit(SH_CACHE_COMBINED, &(boot_cpu_data.icache.flags))) {
+ seq_printf(m, "unified\n");
+ show_cacheinfo(m, "cache", boot_cpu_data.icache);
+ } else {
+ seq_printf(m, "split (harvard)\n");
+ show_cacheinfo(m, "icache", boot_cpu_data.icache);
+ show_cacheinfo(m, "dcache", boot_cpu_data.dcache);
+ }
+
+ seq_printf(m, "bogomips\t: %lu.%02lu\n",
+ boot_cpu_data.loops_per_jiffy/(500000/HZ),
+ (boot_cpu_data.loops_per_jiffy/(5000/HZ)) % 100);
+
+#define PRINT_CLOCK(name, value) \
+ seq_printf(m, name " clock\t: %d.%02dMHz\n", \
+ ((value) / 1000000), ((value) % 1000000)/10000)
+
+ PRINT_CLOCK("cpu", boot_cpu_data.cpu_clock);
+ PRINT_CLOCK("bus", boot_cpu_data.bus_clock);
+#ifdef CONFIG_CPU_SUBTYPE_ST40STB1
+ PRINT_CLOCK("memory", boot_cpu_data.memory_clock);
+#endif
+ PRINT_CLOCK("module", boot_cpu_data.module_clock);
+
+ return 0;
+}
+
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+ return *pos < NR_CPUS ? cpu_data + *pos : NULL;
+}
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ ++*pos;
+ return c_start(m, pos);
+}
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+struct seq_operations cpuinfo_op = {
+ .start = c_start,
+ .next = c_next,
+ .stop = c_stop,
+ .show = show_cpuinfo,
+};
+#endif /* CONFIG_PROC_FS */
+
+#ifdef CONFIG_SH_KGDB
+/*
+ * Parse command-line kgdb options. By default KGDB is enabled,
+ * entered on error (or other action) using default serial info.
+ * The command-line option can include a serial port specification
+ * and an action to override default or configured behavior.
+ */
+struct kgdb_sermap kgdb_sci_sermap =
+{ "ttySC", 5, kgdb_sci_setup, NULL };
+
+struct kgdb_sermap *kgdb_serlist = &kgdb_sci_sermap;
+struct kgdb_sermap *kgdb_porttype = &kgdb_sci_sermap;
+
+void kgdb_register_sermap(struct kgdb_sermap *map)
+{
+ struct kgdb_sermap *last;
+
+ for (last = kgdb_serlist; last->next; last = last->next)
+ ;
+ last->next = map;
+ if (!map->namelen) {
+ map->namelen = strlen(map->name);
+ }
+}
+
+static int __init kgdb_parse_options(char *options)
+{
+ char c;
+ int baud;
+
+ /* Check for port spec (or use default) */
+
+ /* Determine port type and instance */
+ if (!memcmp(options, "tty", 3)) {
+ struct kgdb_sermap *map = kgdb_serlist;
+
+ while (map && memcmp(options, map->name, map->namelen))
+ map = map->next;
+
+ if (!map) {
+ KGDB_PRINTK("unknown port spec in %s\n", options);
+ return -1;
+ }
+
+ kgdb_porttype = map;
+ kgdb_serial_setup = map->setup_fn;
+ kgdb_portnum = options[map->namelen] - '0';
+ options += map->namelen + 1;
+
+ options = (*options == ',') ? options+1 : options;
+
+ /* Read optional parameters (baud/parity/bits) */
+ baud = simple_strtoul(options, &options, 10);
+ if (baud != 0) {
+ kgdb_baud = baud;
+
+ c = toupper(*options);
+ if (c == 'E' || c == 'O' || c == 'N') {
+ kgdb_parity = c;
+ options++;
+ }
+
+ c = *options;
+ if (c == '7' || c == '8') {
+ kgdb_bits = c;
+ options++;
+ }
+ options = (*options == ',') ? options+1 : options;
+ }
+ }
+
+ /* Check for action specification */
+ if (!memcmp(options, "halt", 4)) {
+ kgdb_halt = 1;
+ options += 4;
+ } else if (!memcmp(options, "disabled", 8)) {
+ kgdb_enabled = 0;
+ options += 8;
+ }
+
+ if (*options) {
+ KGDB_PRINTK("ignored unknown options: %s\n", options);
+ return 0;
+ }
+ return 1;
+}
+__setup("kgdb=", kgdb_parse_options);
+#endif /* CONFIG_SH_KGDB */
+